Headphone



FIG. 1 is a front side perspective view of a headphone;

FIG. 2 is a rear side perspective view of the headphone;

FIG. 3 is a front elevational view of the headphone;

FIG. 4 is a rear elevational view of the headphone;

FIG. 5 is a top plan view of the headphone;

FIG. 6 is a bottom plan view of the headphone;

FIG. 7 is a left side elevational view of the headphone; and,

FIG. 8 is a right side elevational view of the headphone.

Portions of the drawings shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a headphone, as shown and described. 